Plastics with unlimited possibilities made in germany

Properties of Fluoroplastics

Feature Standard
Unit PTFE PFA FEP ETFE PCTFE PVDF ECTFE
general                  
Density ISO 1183 g/cm3 2.14 - 2.19 2.12 - 2.17 2.12 - 2.17 1.71 - 1.78 2.10 - 2.16 1.75 - 1.78 1.67 - 1.70
Upper service temperature, without load
   °C
 250-260
 250-260 200-205 150-180 150-180 150-170 150-180
Combustibility

     non-
combustible		 non-
combustible		 non-
combustible		 non-
combustible		 non-
combustible		 non-
combustible		 non-
combustible
Water absorption at 23 °C Saturation
   % <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
thermal Standard
Unit PTFE PFA FEP ETFE PCTFE PVDF ECTFE
Melting temperature ASTM 2116 °C 327
 300-310
 253-282
 265-275
 185-210
 165-178
 240-247
Lin. thermal expansion coefficient DIN 52612 10-5*K-1 10-16
 10-16
 10-14
 8-12
 4-8
 8-18
 4-8
Heat conductivity at 23°C   W/K*m 0.23
 0.22
 0.20
 0.23
 0.19
 0.17
 0.15
Specific heat at 23°C   kJ/kg*K 1.01
 1.09
 1.17
 1.95
 0.92 1.38
  
Oxygen index   % >95 >95 >95 30 >95 43 60
mechanical Standard
Unit PTFE PFA FEP ETFE PCTFE PVDF ECTFE
Tensile strength
 ISO 527
 N/mm²
 29-39
 27-32
 19-25
 36-48
 31-42
38-50
 41-54
at 150 °C
     14-20
 15-21
 4-6
 8-12
 1-2
 7.5-10.5
 3.5-4.5
Elastic limit at 23 °C
 ISO 527
 N/mm²
 10
 14
 12
 24
 40
 46
 34
Ultimate elongation at 23 °C
 ISO 527
 %
 200-500
 300
 250-350
 200-500
 80-250
 20-250
 200-300
Tensile E-Modulus
 ISO 527
 N/mm²
 400-800
 650
 350-700
 500-1200
 1000-1200
 1800-1800
 1200-1800
Limiting bending stress at 23 °C
 ISO 178
 N/mm²
 18-20
 15
   25-30
 52-63
 55
 50
Bending E-Modulus
 ISO 527
 N/mm² 600-800
 650-700
 660-680
 1000-1500 1200-1500
 1200-1400
 1700
Ball indentation hardness
 ISO 2039
   25-30
 25-30
 23-29
 34-40
 55-70
 62-68
 55-65
Rockwell hardness R ISO 2039   20-30 25-35 20-30 45-55 103-118 100-115 85-95
electrical Standard
Unit PTFE PFA FEP ETFE PCTFE PVDF ECTFE
Shore hardness D
 DIN 53505
   55-72
 60-65
 55-60
 63-75
 70-90
 73-85
 70-80
Friction coefficient

     0.05-0.2
 0.2-0.3
 0.3-0.35 0.3-0.5
 0.3-0.4
 0.2-0.4 0.65
Dielectric constant at 100Hz
 IEC 60250
   <2.1
 <2.1
 <2.1
 2.6
 2.3-2.8
   2.3-2.6
at 106
     <2.1
 <2.1
 <2.1
 2.6
 2.3-2.4    
Dielectric loss factor at 100Hz
   *10-4
 0.5-0.7
 0.5-0.7
 0.5-0.7 5-6      
Specific flow resistance
 IEC 60093
 Ω*cm
 >1018
 >1018
 >1018
 >1016
 >1018
 >1015
 >1015
Surface resistance
 DIN 53482
 Ω
 >1016
 >1016
 >1016
 >1014
 >1016
 >1013
 >1012
Creep resistance
 IEC 60112
   KA3c
   KA3c   KA3c    
Dielectric strength IEC 60243-2 kV/mm >40 >50 >50 >40 >40 >40 >40

 

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